a slang term for the the former town known as Willimantic, now one part of the Town of Windham, Connecticut, USA . Often preceded with the word Big, in a sardonic tone. While this town does not have a huge population, it is the largest in that area, thus the derision use by people who are experienced with true modern urban settings, when referring to Willimantic.

We're leaving New York for the holidays...we'll be in Big Willi', living it up in the Quiet Corner of Connecticut.